Teeth-separator



(No Model.)

.F. H. GROSS 8v 0. H. DAVIS.

TEETH SBPARATOL. Patented 1100.22, 1891.

WITNESSES:

Mr W I hm ATTORNEYS TATES aTEN'r rricn.

FREEMAN ll. CROSS AND CLAYTON H. DAVIS, OF PULASKI, NEXV YORK.

TEETH-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 465,555, dated December22, 1891.

Application filed May 4, 1891. $erial No. 391,630. (No model.)

To all whom it may concern:

Be it known that we, FREEMAN H. CROSS and CLAYTON II. DAVIS, of Pulaski,in the county of Oswego, in the State of New York, have invented new anduseful Improvements in Teeth-Separators, of which the following, takenin connection with the accompanying drawings, is a full, clear, andexact description.

Our invention relates to teeth-separators for spreading teeth apart forexamination or filling.

Our object is to provide a teetlrseparator comprising a frame archingover the teeth and carrying on its rear side an adjustable wedge andupon its front side an operatingwedge, all so arranged that it can beadjusted to teeth of varying thickness, and also provided in the archeswith means to hold blocks inserted under them to prevent any wabbling orrocking of the frame.

Our invention consists in the several novel features of construction andoperation hereinafter described, and which are specifically set forth inthe claims hereunto annexed.

It is constructed as follows, reference being had to the accompanyin gdrawings, in which Figure 1 is a top planview of ourseparator as placedupon the teeth. Fig. 2 is a bottom plan of it. Fig. 3 is a verticalsection on a line through the thumb-nuts. Fig. 4: is a rear elevation ofthe same as applied to the teeth. Figs. 5 and 6 are details of one ofthe separating-wedges.

A is the frame, constructed from sheet metal stamped out and swaged upin dies, creating the upturned sides 1, the flat bottom 2, the bars 3,which constitute each side, being also arched, as at 4, and alsocreating the flanges 5, and an aperture to receive the head of thethumb-nut. Upon the bottom we secure the guides 6, through which thewedges 7 fit freely. These wedges consist of a single piece of flatmetal, having a tapered point on one end and a threaded stem on theother. Thumb'nuts 8, each having a head 9 and a groove 10, are insertedunder the flanges 5, with their heads in the apertures, the flanges inthe grooves, and the stem of the wedges in the thumb-nuts, substantiallyas shown. Upon the under side of each of the arches at are spurs 11.

When the separator is placed upon the.

teeth, it is liable to wabble or rock and work itself toward the rootsof the teeth, crowding the wedges more tightly against the gums, and toprevent this tapered blocks 12 of rubber or analogous material areinserted under the arches and the spurs engage therewith and hold themfrom slipping out. These blocks are wedging in order to permit of theiruse where the teeth are of varying lengths. It will be seen that therear wedge ean be adj usted for different thicknesses of teeth, thatboth wedges lie in the same plane, and that the whole device is simple,yet positive in its action, and can be readily taken apart for cleaning,and that the flanges are the bearings for the thumb-nuts, which can alsobe readily removed therefrom when unscrewed from the stems of thewedges.

hat we claim as our invention, and desire to secure by Letters Patent,is

1. A teeth-separator consisting of a frame constructed from an integralpiece of metal and having upturned and arching sides and flanged ends,sliding and independently-adjustable wedges mounted in guides upon thebottom and having threaded shanks, and thun1b-nuts mounted in theflanges and fitting upon the shanks of the wedges and operatedindependently to adjust the wedges, in combination, as set forth.

2. A frame having arching sides, wedges mounted in the frame, and blocksremovably inserted under the arches and means to hold them there, incombination, as set forth.

3. The combination, with the frame, the guides thereon, theindependently-adjustable front and rear wedges mounted in said guides,and means to operate the wedges independdently,of the blocks insertedunder the arches and means to retain them there.

4. In a separator, spurs under the arches of the frame, in combinationwith blocks removably inserted under the arches and with which the spursengage.

5. In a separator, the combination, with the frame, of a rear wedgeadjustable independently of the front wedge and mounted in said frame.

(5. A separator-frame constructed from a single piece of metal, havingarching sides. front and rear arms, flanges upon the ends of.

ICO

the same and provided with notches in the and rear arms, flanges uponthe arms, and flanges and in the arms communicating with notches in thearms and flanges. each other, and independently adjustable In witnesswhereof we have hereunto set our Wedges mounted in guides under saidarms hands this 23d day of April, 1891.

5 and having threaded shanks, in combination FREEMAN H GROSS.

W1th thumb-nuts mounted in said notches and engaging with the shanks ofthe wedges. CLAYTON DAVIS 7. A separator-frame consisting of a single Inpresence of undivided piece of metal stamped out of a HOWARD P. DENISON,

IO metallic sheet and having arching sides, front 0. B. KINNE.

